I could wind you could wind he could wind we could wind you could wind they could wind
V-ing form
I could be winding you could be winding he could be winding we could be winding you could be winding they could be winding
Perfect
I could have wound you could have wound he could have wound we could have wound you could have wound they could have wound
V-ing perfect
I could have been winding you could have been winding he could have been winding we could have been winding you could have been winding they could have been winding
Negation
Simple form
I couldn't wind you couldn't wind he couldn't wind we couldn't wind you couldn't wind they couldn't wind
V-ing form
I couldn't be winding you couldn't be winding he couldn't be winding we couldn't be winding you couldn't be winding they couldn't be winding
Perfect
I couldn't have wound you couldn't have wound he couldn't have wound we couldn't have wound you couldn't have wound they couldn't have wound
V-ing perfect
I couldn't have been winding you couldn't have been winding he couldn't have been winding we couldn't have been winding you couldn't have been winding they couldn't have been winding
Interrogative form
Simple form
could I wind? could you wind? could he wind? could we wind? could you wind? could they wind?
V-ing form
could I be winding? could you be winding? could he be winding? could we be winding? could you be winding? could they be winding?
Perfect
could I have wound? could you have wound? could he have wound? could we have wound? could you have wound? could they have wound?
V-ing perfect
could I have been winding? could you have been winding? could he have been winding? could we have been winding? could you have been winding? could they have been winding?
Interro-negative form
Simple form
couldn't I wind? couldn't you wind? couldn't he wind? couldn't we wind? couldn't you wind? couldn't they wind?
V-ing form
couldn't I be winding? couldn't you be winding? couldn't he be winding? couldn't we be winding? couldn't you be winding? couldn't they be winding?
Perfect
couldn't I have wound? couldn't you have wound? couldn't he have wound? couldn't we have wound? couldn't you have wound? couldn't they have wound?
V-ing perfect
couldn't I have been winding? couldn't you have been winding? couldn't he have been winding? couldn't we have been winding? couldn't you have been winding? couldn't they have been winding?